diff options
| -rw-r--r-- | crates/ide-assists/src/handlers/generate_impl.rs | 13 | ||||
| -rw-r--r-- | crates/ide-assists/src/utils.rs | 76 | ||||
| -rw-r--r-- | crates/syntax/src/ast/edit_in_place.rs | 36 |
3 files changed, 87 insertions, 38 deletions
diff --git a/crates/ide-assists/src/handlers/generate_impl.rs b/crates/ide-assists/src/handlers/generate_impl.rs index 68287a20bf8..307cea3d0a4 100644 --- a/crates/ide-assists/src/handlers/generate_impl.rs +++ b/crates/ide-assists/src/handlers/generate_impl.rs @@ -52,6 +52,7 @@ mod tests { use super::*; + // FIXME: break up into separate test fns #[test] fn test_add_impl() { check_assist( @@ -136,6 +137,18 @@ mod tests { check_assist( generate_impl, + r#" + struct Defaulted<const N: i32 = 0> {}$0"#, + r#" + struct Defaulted<const N: i32 = 0> {} + + impl<const N: i32> Defaulted<N> { + $0 + }"#, + ); + + check_assist( + generate_impl, r#"pub trait Trait {} struct Struct<T>$0 where diff --git a/crates/ide-assists/src/utils.rs b/crates/ide-assists/src/utils.rs index 4ab6e2627fa..38396cd7d7b 100644 --- a/crates/ide-assists/src/utils.rs +++ b/crates/ide-assists/src/utils.rs @@ -2,8 +2,6 @@ use std::ops; -use itertools::Itertools; - pub(crate) use gen_trait_fn_body::gen_trait_fn_body; use hir::{db::HirDatabase, HirDisplay, Semantics}; use ide_db::{famous_defs::FamousDefs, path_transform::PathTransform, RootDatabase, SnippetCap}; @@ -15,7 +13,7 @@ use syntax::{ edit_in_place::{AttrsOwnerEdit, Removable}, make, HasArgList, HasAttrs, HasGenericParams, HasName, HasTypeBounds, Whitespace, }, - ted, AstNode, AstToken, Direction, SmolStr, SourceFile, + ted, AstNode, AstToken, Direction, SourceFile, SyntaxKind::*, SyntaxNode, TextRange, TextSize, T, }; @@ -424,34 +422,44 @@ pub(crate) fn generate_trait_impl_text(adt: &ast::Adt, trait_text: &str, code: & } fn generate_impl_text_inner(adt: &ast::Adt, trait_text: Option<&str>, code: &str) -> String { - let generic_params = adt.generic_param_list(); + // Ensure lifetime params are before type & const params + let generic_params = adt.generic_param_list().map(|generic_params| { + let lifetime_params = + generic_params.lifetime_params().map(ast::GenericParam::LifetimeParam); + let ty_or_const_params = generic_params.type_or_const_params().filter_map(|param| { + // remove defaults since they can't be specified in impls + match param { + ast::TypeOrConstParam::Type(param) => { + let param = param.clone_for_update(); + param.remove_default(); + Some(ast::GenericParam::TypeParam(param)) + } + ast::TypeOrConstParam::Const(param) => { + let param = param.clone_for_update(); + param.remove_default(); + Some(ast::GenericParam::ConstParam(param)) + } + } + }); + + make::generic_param_list(itertools::chain(lifetime_params, ty_or_const_params)) + }); + + // FIXME: use syntax::make & mutable AST apis instead + // `trait_text` and `code` can't be opaque blobs of text let mut buf = String::with_capacity(code.len()); + + // Copy any cfg attrs from the original adt buf.push_str("\n\n"); - adt.attrs() - .filter(|attr| attr.as_simple_call().map(|(name, _arg)| name == "cfg").unwrap_or(false)) - .for_each(|attr| buf.push_str(format!("{}\n", attr).as_str())); + let cfg_attrs = adt + .attrs() + .filter(|attr| attr.as_simple_call().map(|(name, _arg)| name == "cfg").unwrap_or(false)); + cfg_attrs.for_each(|attr| buf.push_str(&format!("{attr}\n"))); + + // `impl{generic_params} {trait_text} for {name}{generic_params.to_generic_args()}` buf.push_str("impl"); if let Some(generic_params) = &generic_params { - let lifetimes = generic_params.lifetime_params().map(|lt| format!("{}", lt.syntax())); - let toc_params = generic_params.type_or_const_params().map(|toc_param| { - let type_param = match toc_param { - ast::TypeOrConstParam::Type(x) => x, - ast::TypeOrConstParam::Const(x) => return x.syntax().to_string(), - }; - let mut buf = String::new(); - if let Some(it) = type_param.name() { - format_to!(buf, "{}", it.syntax()); - } - if let Some(it) = type_param.colon_token() { - format_to!(buf, "{} ", it); - } - if let Some(it) = type_param.type_bound_list() { - format_to!(buf, "{}", it.syntax()); - } - buf - }); - let generics = lifetimes.chain(toc_params).format(", "); - format_to!(buf, "<{}>", generics); + format_to!(buf, "{generic_params}"); } buf.push(' '); if let Some(trait_text) = trait_text { @@ -460,23 +468,15 @@ fn generate_impl_text_inner(adt: &ast::Adt, trait_text: Option<&str>, code: &str } buf.push_str(&adt.name().unwrap().text()); if let Some(generic_params) = generic_params { - let lifetime_params = generic_params - .lifetime_params() - .filter_map(|it| it.lifetime()) - .map(|it| SmolStr::from(it.text())); - let toc_params = generic_params - .type_or_const_params() - .filter_map(|it| it.name()) - .map(|it| SmolStr::from(it.text())); - format_to!(buf, "<{}>", lifetime_params.chain(toc_params).format(", ")) + format_to!(buf, "{}", generic_params.to_generic_args()); } match adt.where_clause() { Some(where_clause) => { - format_to!(buf, "\n{}\n{{\n{}\n}}", where_clause, code); + format_to!(buf, "\n{where_clause}\n{{\n{code}\n}}"); } None => { - format_to!(buf, " {{\n{}\n}}", code); + format_to!(buf, " {{\n{code}\n}}"); } } diff --git a/crates/syntax/src/ast/edit_in_place.rs b/crates/syntax/src/ast/edit_in_place.rs index 7d632352828..173c064ccc9 100644 --- a/crates/syntax/src/ast/edit_in_place.rs +++ b/crates/syntax/src/ast/edit_in_place.rs @@ -265,6 +265,42 @@ impl ast::WhereClause { } } +impl ast::TypeParam { + pub fn remove_default(&self) { + if let Some((eq, last)) = self + .syntax() + .children_with_tokens() + .find(|it| it.kind() == T![=]) + .zip(self.syntax().last_child_or_token()) + { + ted::remove_all(eq..=last); + + // remove any trailing ws + if let Some(last) = self.syntax().last_token().filter(|it| it.kind() == WHITESPACE) { + last.detach(); + } + } + } +} + +impl ast::ConstParam { + pub fn remove_default(&self) { + if let Some((eq, last)) = self + .syntax() + .children_with_tokens() + .find(|it| it.kind() == T![=]) + .zip(self.syntax().last_child_or_token()) + { + ted::remove_all(eq..=last); + + // remove any trailing ws + if let Some(last) = self.syntax().last_token().filter(|it| it.kind() == WHITESPACE) { + last.detach(); + } + } + } +} + pub trait Removable: AstNode { fn remove(&self); } |